Re: AP900GTO - DEC stiffness

Roland Christen

In a message dated 3/22/2010 1:05:23 PM Central Daylight Time,
calypte@... writes:

WRT the above quoted statement -- OK, that's true for Maxim DL. What
about CCDSoft? Not an A-P mount, of course, but I've found little benefit to
setting the dec parameter to anything other than zero for autoguiding.
Always set the Dec to zero, otherwise you are courting potential
instability due to higher loop gain. You always want the loop gain to be 100% or
lower. Loop gain over 100% means that the correction signal sent to the mount
will be larger than the error it is trying to correct. That will cause the
mount to overshoot and begin limit cycling, hunting or oscillating.


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